Improvement in calendaes



AMBROSE s. Voss, OF RNDoLPH-, VERMON'I.v

Leners Patent N0.- 75,659, dated March 17,1868.

IMPnov-EMENT IN CALENDARS;

llg Stlnhuglr rzfemi te .in tiges @rims ntmt mit making nf its same.

To ALL WHoM IT MAY coNcERN: l

Be it known that. I, AMBROSE S. Voss, of the town of Randolph, in the county of Orange, and State of l Vermont, have invented a new and useful Improvement in Calendar-Attachments to Clocks; and I do hereby declare the `following tobe afull, clear, and exact description ofthe same, reference' being had to the accompanying drawing, making a part of this specification, in which- Figure 1 represents a front of the machine attached to a common clock. Figure 2 representsa front view of the inside gearing that works the month-hand, and the revolving plates carrying the disks that show the month and day of the week; and

Figure 3 is a rear view of the same.` l

My invention consists in constructing a perpetual calendar, with a. combination of levers und wheels, in such a way that it may be set on the top of any common clock, andpbeopcrated by the hour-hand of such clock, by means of a lever running from the calendar to intersect with the motion of thehand in such manner as to make its own adjustments, and give theday of the month and thed'day of the week correctly.

`To enable others skilled in the art to make and use my invention, I' will proceed to describe its construction and operation..

I construct three ratchet-wheels, represented in iig. 2 by letters a b c, and attach them to the frame d by means of a shaft passing through their cen-tre. The wheel a has sixtytwo teeth, and ismade fast to the shaft, on which is placed the hand e that points tothe day of the month over the dial-face, jig. 1. The wheelb has fourteen teeth, and turns on the centre-shaft e,(and`is provided with a flange or .collar a quarter of an inchin length, upon which the month-wheel c is mounted and turns. Said wheel is provided with twelve teeth, corresponding to the months in the year. 4The wheels a and b are each moved by small spring-pawls a: z, on the leverf,one notch by each vibration of said lever. The leverfvmakes 'two vibrations every twenty-fouihours,

carrying or turning the wheels a and b forward two notches; hence the wheel a, having sixty-two teeth, perf forms one revolution in thirty-one days, each day being shown by the hand e', 'on the dial-plate, fig. 1. The wheel b has fourteen teeth, and performs-one revolution in seven days, turning thc dial-plate-g attached to it, and showing the day 'of' the week through thedlial, (see fig. 1, at h.)

To show the month of the year, I attach to the wheel a an eccentric-plate, which raises the' lever J through i' the pin k in twenty-eight daysLequal te the shortest month in the year.. When the leve`1l J falls, it strikes the small spring-catch z, on the Wheel a, and turns the wheel the remaining part of tho thirty-one days, setting the handr s to the iirst day ofthe next month. The wheel c, which has twelve teeth, corresponding with the 4twelve monthsof the year, is turned one notch by the fallingof the lever J, by means of-the catch l. The circular plate m is firmly attached to the wheel c, which is set by tho lever J, showing tho month of the year'at monV the face, iig. 1.

To graduate the dropping of levervJ 'tothe day corresponding to the length ofthe d'eront months, Iattach i a small ratcl|ct-\vllecl, 0, to the end of the centreshaft, on the back of the frame d, said wheel o having five tecth,'ns shown in Sg. 3, turning the whe'elp, which has sixty tccth, and performs one revolution in a year. To.

this year-wheel I attach the plate q, .the outer surface of which is divided into twelve sectional teeth, the size or length of each corresponding to the number of days'in'cach month, on which rests the pin passing through the plate from the lcvers, which is connected with levei J, and holds the lever from dropping after the eccentric leaves the pin, until the remaining daysof the month are shown.

The weight u isto give the lever suiicietpower to govern the changes, thus making a machine to show correctly each month of the year, each day of the month, and each day of the week, by a calendar that may be attached to any common clock now in use in the following manncr,viz: The calendar-may be placed on the top of any common clock, as shown in'fig.1v, and held in any substantial manner; thaleverfpassing down' through the case of' the clock on the outside-of the face, the forkof the lever-f embracing the shaft on whichthe hands are placed, at a point directly underneath the hour-hand. Then a'pin is putin the hour-hand at n, one inc h from the centre, that touches the forks of the lever in the revolution of the hand, and gives to said lever one vibration every twelve hours, as'descrbed. i

Having now described my invention,'whot I cloim ns new, and desire to secure by Letters Patent, is-

1. The construction of the perpetual celendar, wherebyit is adapted-to De nttzfched to and operated by any clock, by means of the hour-bend afnd fqrked lever, substantially as described. l Y

` 2. The levers s and J, combned with the plate q, to set the month-hand e from the` last day of months ofdierent lengths to the irst day of the succeeding mcnth, and to set the nonth of the year at the same time,

substantially as described.

AMBROSE s. Voss;-lv l Witnesses:

ALBERT Voss. LYMAN Grass. 

